Hit up Clem (Adam) or Luther from Flemmings Automotive. Both are great installers and have great prices.

Adam is near Ellicot City and Luther is in Beltsville. Both worth the drive.

No experience with Luther but I can personally vouch for Adam's all-around excellence when it comes to anything mechanical. It's certainly worth some extra travel time when you consider the peace of mind that comes with having an enthusiast work on your car who isn't looking to rip you off.